I have added some pics of the back. I'll post some better pics next time. These are taken with my phone.
The gel is: http://www.feelunique.com/p/LOreal-Profe...Glue-150ml. Don't know whether you have this one in the States. It's the professional line of L'Oréal sold in salons. But I must say that if the ventilation is not right in the front you will never have this effect. So just send a picture or specify spikey front. Personally I think the color is a tiny bit off. Then again, today I saw two guys at the tanning salon. They were not wearing. Pretty sure of that and the hair on top was also lighter / sun bleached than the rest. What I can do next time is use half a shade lighter when I color my own hair.
Thanks for the feedback. Much appreciated.